A Fast Radio Burst (FRB) Capture Sys tem for the Onsala Space Observatory
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Typ
Examensarbete för masterexamen
Program
Embedded electronic system design (MPEES), MSc
Publicerad
2021
Författare
Jia, Bocheng
Chen, Xiao
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
The discovery of the fast radio burst (FRB) in 2007 was an important moment in
astronomy due to FRB’s unique property, which helps astronomers explore how the
universe expanded and gives clues to study celestial phenomenons such as the ap pearance of neutron stars. The purpose of this thesis is to explore and develop a
new digital backend system for Onsala Space Observatory to capture FRB events in
real time and reduce the data rate. A trigger mechanism that can flag the FRB can didates is implemented. Only when potential FRB candidates are detected, signal
data would be buffered and saved. We implemented polyphase filterbank channel ization to generate the signal’s spectrum in real time. Moreover, we implemented
incoherent de-dispersion algorithms to compensate for the frequency-dependent de lay. Filtering and averaging are introduced to improve an FRB’s signal-to-noise
ratio. We first built the system model in MATLAB and analyzed the simulation
results. We also demonstrated the hardware implementation of the FRB capturing
system and tested the system with a signal generator. The test results showed that
our system is able to capture FRB events and reduce the data rate compared to the
current system in Onsala Space Observatory.
Beskrivning
Ämne/nyckelord
Fast Radio Burst , Radio astronomy , Incoherent dedispersion , Polyphase filterbank channelizer , FPGA , Data rate reduction